Lead-210
Properties and data of the isotope 210Pb.
See also: List of individual Lead isotopes (and general data sources).
General data
Name of the isotope:Lead-210; Pb-210Other names:Radioblei. Radium DSymbol:210Pb or 21082PbMass number A:210 (= number of nucleons)Atomic number Z:82 (= number of protons)Neutrons N:128Nucleon pairing (Z - N):even - evenNuclear ratio (N/Z ratio):1.5609756097561 (= neutron-proton ratio)Neutron excess (N-Z):46Isotopic mass:209.9841883(16) u (atomic weight of Lead-210)Nuclide mass:209.9392099 u (calculated nuclear mass without electrons)Mass excess:-14.7285 MeVMass defect:1.766573572 u (per nucleus)Nuclear binding energy:1645.55268288 MeV (per nucleus)
7.83596516 MeV (average binding energy per nucleon)Separation energy:SN = 5.1852(12) MeV (first neutron)
SP = 8.373(6) MeV (first proton)Half-life:22.20(22) aDecay constant λ:9.900688195399 × 10-10 s-1Specific activity α:2852791336029.2 Bq g-1
77.10246854133 Ci g-1Spin and parity:
(nuclear angular momentum)0+Charge radius:5.5208(16) femtometer fmYear of discovery:1900
Radioactive Decay
Half-life T½ = 22.20(22) a respectively 7.001 × 108 seconds s.
Decay
mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| β- | 210Bi | < 100 % | 0.0635(5) MeV | |
| α | 206Hg | trace | 3.792(20) MeV | |
Parent Nuclides
Direct parent isotopes are: 210Tl, 214Po, 224Ra, 234U.
Nuclear Isomers
Nuclear isomers or excited states with the activation energy in keV related to the ground state.
| Nuclear Isomer | Excitation Energy | Half-life | Spin |
|---|
| 210mPb | 1278(5) keV | 201(17) ns | 8+ |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 128) and isobaric (same nucleon number A = 210) with Lead-210. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| Z | Isotone N = 128 | Isobar A = 210 |
|---|
| 77 | 205Ir | |
| 78 | 206Pt | |
| 79 | 207Au | 210Au |
| 80 | 208Hg | 210Hg |
| 81 | 209Tl | 210Tl |
| 82 | 210Pb | 210Pb |
| 83 | 211Bi | 210Bi |
| 84 | 212Po | 210Po |
| 85 | 213At | 210At |
| 86 | 214Rn | 210Rn |
| 87 | 215Fr | 210Fr |
| 88 | 216Ra | 210Ra |
| 89 | 217Ac | 210Ac |
| 90 | 218Th | 210Th |
| 91 | 219Pa | 210Pa |
| 92 | 220U | |
| 93 | 221Np | |
| 95 | 223Am | |
External data and identifiers
CAS:14255-04-0InChI Key:WABPQHHGFIMREM-AKLPVKDBSA-NSMILES:[210Pb]PubChem:ID 6328175Adopted Levels, Gammas:NuDat 210Pb
Literature and References
[1] - Agnieszka Dołhańczuk-Śródka:
The Use Of Pb-210 Isotope As An Indicator Of Pollutants' Migration In The Environment.
In: Ecological Chemistry and Engineering S, (2015), DOI 10.1515/eces-2015-0020.
Last update: 2021-02-28
Perma link: https://www.chemlin.org/isotope/lead-210
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